Fishing tool



Jan, 22, 1924.

J. E. HARRISON FISHING. TOOL 2 z N, H 4W 2 m w m x 5 9,. 5 w M a QM m 2w 0 w y 6, W W r m. z \\M 3 w/. r M w 71 J t T r x H. s 6 ..l. d 2 v z yw 5 Mm M Z 4 v...

- Filed J Jan. 22, 1924.

J. E. HARRISON FISHING TOOL 2 Sheets-Sheet 2 C/HME5E/ /44 /J0/Y PatentedJan. 22, 112%. I

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' FISHING- T001.

Application filed January 19, 1928. Serial No. 613,676.

To all whom it may concern:

Be it known that I, JAMES E. HARRISON, a citizen of the United States,residin at Ardmore, in the county of Carter and tate of Oklahoma, haveinvented certain new and useful Improvements in Fishing Tools, of whichthe following is a specification.

This invention relates to fishing tools for removing obstructions fromwells.

An object of the invention is the provision of spring actuated means foroperating the gripping jaws when the fishing tool is lowered into thewell and an obstruction encountered.

A further object is the provision of means for normally restraining theoperating means.

A further object is the provision of means for locking the operatingmeans to prevent the gripping jaws from opening after the obstructionhas been seized by the jaws.

In the accompan ing drawings, I have shown several embo iments of theinvention. In this showing:

Fi re 1. is a side elevation of one form of fis ing tool,

Figure 2 is a vertical sectional view on line 22 of Figure 1,

Figure 3 is a similar View on line 3-3 of Figure 2,

Fii gure 4 is a bottom plan View of the too Figure 5 is a detailhorizontal sectiona; view on line 55 of Figure 2,

Figure 6 is a similar View on line 66 of Figure 3,

Figure 7 is a bottom plan view of another form of the invention,

Figure 8 is a detail View of the jaws shown in Figures 1 to 6 of thedrawings, and,

Figure 9 is a perspective view of the lockingmechanism.

eferring to the drawings, the reference numeral 1 designates a socketwhich is hollow and open at the bottom end, as shown. Adjacent thebottom, the interior of the socket is enlarged, as at 2, the upperportion 3 being of smaller diameter. The lower edge of the socket isprovided with a pair of diametrically opposed slots 4. The side walls ofthese slots are provided with recesses 5 for the reception of the endsof pivot pins 8. J aw members 7 are pivotally mounted on these pins.These jaw members may be of any desired shape. As shown, they areprovlded ,With teeth 8, adjacent thelower end adapted to en age anobstruction in the well. The inner aces of the jaw members are providedwith recesses 9 below the pivots adapted to receive a coil spring 10bymeans of which the jaw members are normally retained in spacedrelation. A plunger 12 is mounted in the upper part of the socket. Whenthe jaws are in spread position, the

plunger is lifted, as shown in Figure 2 of the drawings. The lower endof the plunger is pointed, as at-13, and is adapted to be receivedbetween the upper ends 14 of the jaws to spread the upper ends of the.jaws and thus close the lower ends of the jaws.

The plunger is provided with a shoulder 15 immediately above the pointedend and -a coil spring 16 is adapted to be arranged around the plungerbetween this shoulder and a transverse wall 17 adjacent the top of thesocket. When the plunger is in raised position, the spring is retainedunder com pression. The plunger is retained in this position by means ofa pin 18, of soft metal, which passes through an opening in the plungerand through openings in the sides of the socket. The upper portion ofthe plunger is provided with ratchet teeth 19. Suitable locking membersare adapted to engage these teeth to prevent upward movement of theplunger. As shown, locking members 20 are arranged in recesses 21,adjaoent the top of the socket. These locking members are provided witharcuate inner faces 22, curved on a radius substantially e ual to theradius of the plunger and provided with teeth 23/ Plates 24: arearranged in the faces of thesocket, slightly spaced from the lockingmembers. 0011 springs 25 are, arranged between the locking members andthe plates 24 to retain the locking members in en agement with theteeth- 19 of the plunger. uitable guide members 26 extend upwardly fromthe locking members through slots 27 in the top of the socket. Theplates 24 are provided with openings 28 for the passage of bolts 29.These bolts are received 111 threaded openings in the locking membersand are rovided with. nuts 30, ar-

rangedinterior y of the socket and of larger a wel .in a threadedopening in the bottom of a plunger in raised osition and the pin passingthrough the p unger and the wall of the socket. The spring 16 is thenunder compression. With the parts in thisposition, the fishing tool islaced on the end of a strin of tools or drill rod and lowered into henthe tool strikes an obstruction, the jaws are adapted to straddle it.The lower ends of the jaws are spaced from each other a greater distancethan the portion adjacent the pivot and as the obstruction moves intothe space between the jaws, the downward movement of the tool isarrested. The tool is then raised and lowered with a quick snappingaction, which shears the soft metal pin 18 and permits the spring toforce the lunger downwardly. The pointed end 13 then enters the spacebetween the upper ends 14 of the jaws and spreads the upper ends ofthejaws, thus closin the lower ends. When the obstruction has eengrasped, it is then lifted from the well, the locking members 20engaging the teeth 19 and preventing upward movement of the plunger. Toreset the tool, the nuts 30 are tightened on the bolts 29, withdrawingthe locking members and permitting upward movement of the lunger. Theplunger is then moved upwar ly until the opening for the pin 18 is inalinement with the openings in the wall of the socket and a new pininserted, holding the spring 16 under compression.

As stated, any type of gripping jaws may be employed and in .Figure 7 ofthe draw-- ings, I have shown a tool provided with three iaws 34. Thesejaws are mounted on suitab of the socket.

It is to be understood that the forms of the invention herewith shownand described. are to be taken. as preferred examples of the same, andthat various changes E1 the shape, size, and arrangement of parts may beresorted to without departing from the spirit of the invention or thescope of the subjoined claims.

e pivots (not shown) in the lower end .mounted in said socket above saidjaws and adapted to close said jaws when in lowered position, means fornormally retainingsaid plunger in raisedposition, and a spring to lowersaid plunger when .said retaining means are released.

2. In a device of the character described, a

socket, a pair of gripping jaws pivotally mounted in said socket, amovable plunger mounted in said socket above said jaws and adapted toclose said jaws when in lowered position, a severable pin passingthrough said socket and said plunger to normally retain said plunger inraised position, and a spring adapted to lower said. plunger when saidin is severed.

3. n a device of the character described,

a socket, a pair of jaw members pivotally mounted in the lower end ofsaid socket, said jaw members being; provided with extensions Within-saidsocket and above their pivotsya plunger arranged in saidsocketmembers being provided with extensions above their pivots arrangedin said socket, a plunger arranged in said socket above said extensions,said plunger being provided with a lower tapered end adapted to bereceived between,- said extensions to spread them and close the lowerends of said jaws,

a severable pin normally retaining said plunger in raised position, aspring adapted severed, and means for preventing upward movement of saidplunger.

In testimony whereof, I aflix my signature in presence of two witnesses.

. JAMES E. HARRISON.

Witnessess: Y

DANIEL S. HAnRIsoN, J. R. CLARK.

to lower said plunger when said pin is i

